187891 2018-07-22 11:02:25 -0700 [JSC] GetByIdVariant and InByIdVariant do not need slot base if they are not "hit" variants 2018-07-22 12:25:17 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 164904 1 ysuzuki ysuzuki ews-watchlist keith_miller mark.lam msaboff saam webkit-bug-importer oldest_to_newest 1444152 0 ysuzuki 2018-07-22 11:02:25 -0700 [JSC] GetByIdVariant and InByIdVariant do not need slot base if they are not "hit" variants 1444153 1 345540 ysuzuki 2018-07-22 11:02:35 -0700 Created attachment 345540 Patch WIP: comments are welcome! 1444154 2 saam 2018-07-22 11:09:17 -0700 (In reply to Yusuke Suzuki from comment #0) > [JSC] GetByIdVariant and InByIdVariant do not need slot base if they are not > "hit" variants Seems reasonable 1444155 3 ysuzuki 2018-07-22 11:12:51 -0700 I've ensured that this patch fixes performance regression in SixSpeed/destructuring-es6. Previously, this bug makes some statuses "Slow", and emits "GetById" DFG node. And it breaks OAS. baseline patched destructuring.es6 322.4751+-2.8517 ^ 96.2486+-5.5259 ^ definitely 3.3504x faster https://arewefastyet.com/#machine=29&view=single&suite=six-speed&subtest=destructuring-es6 1444157 4 345541 ysuzuki 2018-07-22 12:17:38 -0700 Created attachment 345541 Patch 1444158 5 ysuzuki 2018-07-22 12:18:03 -0700 OK, the patch is ready. 1444159 6 345541 saam 2018-07-22 12:23:18 -0700 Comment on attachment 345541 Patch r=me seems reasonable 1444160 7 ysuzuki 2018-07-22 12:24:39 -0700 Committed r234090: <https://trac.webkit.org/changeset/234090> 1444161 8 webkit-bug-importer 2018-07-22 12:25:17 -0700 <rdar://problem/42481622> 345540 2018-07-22 11:02:35 -0700 2018-07-22 12:17:36 -0700 Patch bug-187891-20180723030234.patch text/plain 2902 ysuzuki U3VidmVyc2lvbiBSZXZpc2lvbjogMjM0MDg5CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCA3 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